Equipment monitoring and diagnosis device

A diagnostic device and equipment technology, applied in the direction of electrical testing/monitoring, testing/monitoring control systems, instruments, etc., can solve problems such as equipment degradation and other information omissions

Inactive Publication Date: 2017-08-25
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, in the transitional state after switching the number of units, the behavior depending on the characteristics of the equipment may become prominent until it is eliminated by control. Therefore, there is a method of removing the transitional state and modeling it. Possibility of missing information such as deterioration
Furthermore, in the method of detecting a departure from the observed state by initially considering the normal operation to be correct, it is impossible to detect the mismatch of the number of units caused by the change in the operation of the load side, the poor demand estimation at the initial time point, and the like. for inappropriate situations

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0029] figure 1 It is a block diagram of Embodiment 1 of the monitoring and diagnosing apparatus of the equipment of this invention.

[0030] The equipment group 100 to be monitored includes heat source equipment such as a cooling tower 101 , a refrigerator 102 , a boiler 104 , and a gas engine 105 , and a customer 103 . All of them are composed of one or more devices and needs of the same type. In addition, each customer 103 has heat exchangers 106 and 107 that receive heat from a heat source, and a load 108 . In addition, the heat exchangers 106 and 107 cannot necessarily be said to be essential equipment. In addition, although not shown here, a liquid delivery pump for driving a heating agent such as water or hot water, a driving device for this, a valve, and the like are also targeted.

[0031] The monitoring and diagnosing device 1000 includes: a state data collection unit 110 for each function such as liquid feeding and heat supply, and collects process quantities fro...

Embodiment approach 2

[0037] figure 2 It is a configuration diagram of Embodiment 2 of the device monitoring and diagnosing device of the present invention, and is a monitoring and diagnosing device 2000 that applies (1) the method of using the efficiency of the entire device when judging the validity of the operating state.

[0038] In the case of using the operating efficiency of the equipment, the efficiency of the entire equipment to be evaluated is calculated based on the efficiency evaluation formula registered in the efficiency evaluation formula storage unit 142 and the data collected by the data collection unit 110 in advance, and the group classification unit 122 In this process, the result (group classification result data 124 ) obtained for the probability that the process state at this time belongs to each group is used, and the group efficiency learning unit 140 that associates each group with efficiency is used. In addition, the efficiency evaluation expression recorded in the effic...

Embodiment approach 3

[0041] image 3 It is a configuration diagram of Embodiment 3 of the monitoring and diagnosing device for equipment according to the present invention, and is a monitoring and diagnosing device 3000 that applies (2) the method of using operating conditions determined in advance at the time of design, etc., when judging the validity of the operating state .

[0042] The operating conditions assumed at the design time point correspond to the design concept such as "the liquid delivery function is based on the constant pressure control of the pump". In order to deal with them in the monitoring and diagnosing device 3000, use: assume the running state storage unit 150 to define such a state with a simple definition; Feature grouping extraction result data 123), evaluate the degree to which the grouping corresponds to the assumed operating state; and the assumed state grouping relationship development part 152, evaluate the relationship between the assumed operating state defined ab...

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Abstract

The invention provides a monitoring and diagnostic device of an apparatus. Even if the monitoring and diagnostic device is unmatched with the apparatus at first in an operation stage, the monitoring and diagnostic device is capable of detecting defective operation conditions and highly precisely determining the apparatus which has deep relation with it. The monitoring and diagnostic device monitors the operation of machines which parallel form a region energy supply system of a workshop. The monitoring and diagnostic device is provided with a part which measures and stores process amounts during operation of devices and ON / OFF states of the devices in operation and performs grouping according to functions of water sending, cold and heat supplying, heat exchanging and so on. The monitoring and diagnostic device is also provided with a grouping / classification part which judges groups to which the functions of the targeted workshop belong and display process amounts and relations of the grouping in all function units according to processing amounts and ON / OFF states collected in a certain period.

Description

technical field [0001] The present invention relates to equipment capable of early detection of abnormality and deterioration in equipment such as workshops, especially abnormalities such as performance degradation and overload due to mismatch between setting of control systems related to operation such as number control and actual load. Monitor diagnostics. Background technique [0002] In buildings with centralized heat sources and district cooling and heating systems, heat exchangers, pipes, pumps, etc. that send the heat and electricity generated here from heat source equipment, power generation equipment, to occupants and tenants as consumers Conveyor system, fan coil unit, air conditioning unit and other equipment on the demand side, etc., are composed of various equipment. In particular, in equipment dealing with heat and fluid, there are upper and lower limits in operation in terms of efficiency, etc., and when the load state changes more than this, a plurality of e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
CPCG05B23/0208
Inventor 石井良和岛仓谕佐佐木浩人川端薫
Owner HITACHI LTD
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